« previous next »

Author Question: The ________ in our atmosphere is the result of photosynthesis by plants. Fill in the blank(s) ... (Read 97 times)

Collmarie

  • Hero Member
  • *****
  • Posts: 569
on: Jul 27, 2018
The ________ in our atmosphere is the result of photosynthesis by plants.
 
  Fill in the blank(s) with correct word

Question 2

Briefly describe how an impact could lead to a mass extinction.
 
  What will be an ideal response?


at

  • Sr. Member
  • ****
  • Posts: 359
Reply #1 on: Jul 27, 2018
Answer to Question 1

oxygen

Answer to Question 2

A large impact could send huge quantities of dust into the atmosphere, where it would block out sunlight for several years. The surface cools and plants die for lack of sunlight. Effects propagate through the food chain, leading to death and extinction on an enormous scale. Acid rain may have killed vegetation and acidified lakes. Chemical reactions may have produced nitrous oxides that dissolved in the oceans and killed marine organisms.


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
« previous next »
 

Did you know?

In 2006, a generic antinausea drug named ondansetron was approved. It is used to stop nausea and vomiting associated with surgery, chemotherapy, and radiation therapy.

Did you know?

Before a vaccine is licensed in the USA, the Food and Drug Administration (FDA) reviews it for safety and effectiveness. The CDC then reviews all studies again, as well as the American Academy of Pediatrics and the American Academy of Family Physicians. Every lot of vaccine is tested before administration to the public, and the FDA regularly inspects vaccine manufacturers' facilities.

Did you know?

There can actually be a 25-hour time difference between certain locations in the world. The International Date Line passes between the islands of Samoa and American Samoa. It is not a straight line, but "zig-zags" around various island chains. Therefore, Samoa and nearby islands have one date, while American Samoa and nearby islands are one day behind. Daylight saving time is used in some islands, but not in others—further shifting the hours out of sync with natural time.

Did you know?

Recent studies have shown that the number of medication errors increases in relation to the number of orders that are verified per pharmacist, per work shift.

Did you know?

Of the estimated 2 million heroin users in the United States, 600,000–800,000 are considered hardcore addicts. Heroin addiction is considered to be one of the hardest addictions to recover from.

The seed-to-seed life of flowering plants. The seed-to-seed life of flowering plants.
Comparison of the level of skin damage as a result of the three different degrees of burns. Comparison of the level of skin damage as a result of the three different degrees of burns.
Plants Plants
Photosynthesis: How Glucose Is Made During photosynthesis, the leaves of green plants absorb Photosynthesis: How Glucose Is Made During photosynthesis, the leaves of green plants absorb
Cretinism can result in a child born to a mother who was iodine deficient during early pregnancy Cretinism can result in a child born to a mother who was iodine deficient during early pregnancy
Mr. jackson's lab result - Chest X-Ray, CT Scan of Brain, and Cerebral Angiogram Mr. jackson's lab result - Chest X-Ray, CT Scan of Brain, and Cerebral Angiogram
Video: First Stage of Labor and Delivery Video

For a complete list of videos, visit our video library